Table 3

RR for incident psoriatic arthritis by body mass index in the general population

Body mass index (kg/m2)
<25.025.0–29.930.0–34.9≥35.0p For trend
Cases of psoriatic arthritis, N551591363231
Incidence rate/10 000 person-years1.23(1.13–1.34)1.47(1.35–1.59)2.05(1.84–2.27)2.67(2.34–3.04)<0.001
Age- and sex-adjusted RR (95% CI)1.00(reference)1.17(1.04–1.32)1.60(1.40–1.83)2.01(1.72–2.34)<0.001
Multivariate RR (95% CI)*1.00(reference)1.17(1.04–1.31)1.57(1.38–1.80)1.96(1.68–2.29)<0.001
  • * The multivariate adjusted model includes age, sex, smoking status, alcohol consumption and history of trauma.